Machine for coating printers&#39; rollers



y 1936. c. G. BINGHAM 2,047,993

MACHINE FOR COATING PRINTERS ROLLERS Original Filed Nov. 22, 1933 2 Sheets-Sheet l f: o o o w y 1936- c. G. BINGHAM 2,047,993

MACHINE FOR COATING PRINTERS ROLLERS Original Filed Nov. 22, 1933 2 Sheets-Sheet 2 imercfor' Patented July 21, 1936 UNITED STATES PATENT OFFICE MACHINE roa coa'rmc r TERS ROLLERS Carl G. Bingham, Highland Park, assignor to Sam! Binghams Son Mfg. (70., Chicago, 11]., a

corporation of Illinois 15 Claims. 01. 91-30) This invention relates to machines for coating printers rollers, and relates particularly to such machines of the general type which forms the subject-matter of my co-pending application filed September 11, 1933, and numbered serially 688,951, said rollers consisting of a metal shaft or stock, a durable and lasting body portion secured thereon, sometimes but not necessarily encased ina tubular covering or jacket of fabric, rubber or other suitable material, and a thin coating of roller composition of substantially uniform thickness, as near as may be applied to the outer cylindrical surface-of the body portion of the roller, said coating of roller composition being removableas by washingand renewable when necessary to restore standard performance of the rollers in use.

The object of the present invention is to provide new and improved means orapparatus for applying the outer coating or layer of roller composition to the body portions of printers rollers, which will be simple in construction, effective for itssdesigned purpose and relatively inexpensive, both as regards construction and operation.

To eifect the object thereof, a machine for coating printers rollers embodying myinvention and improvements comprises the various features, combinations of features and details of construction hereinafter described and claimed.

In the accompanying drawings, in which the invention is fully illustrated,

Fig. 1 is a side elevation of a machine embodying my invention and improvements, parts thereof being shown in longitudinal vertical section.

Fig. 2 is an enlarged sectional end view, in a plane indicated substantially by the line 2-2 of Fig. 1. i i

Fig. 3 is a detached perspective view of a novel form of spatula or spreader for applying roller composition to rollers to be coated, and the means for mounting the same in the machine; and

Fig. 4 is a detached end view of said spatula or spreader.

In the drawings, I have shown my improved spatula or spreader for applying roller composition, as embodied in and forming part of an organized machine, which, as regards its usual features and excepting as hereinafter may be particularly described and pointed out, may be'of substantially the same construction as the machine which forms the subject matter of my said co-pending application, Serial Number 688,951, to which reference is here made for a description in detail and without repetition, of features not herein shown or fully described.

I do not, however, desire to limit the invention to its embodiment in the particular machine shown and described in my said prior application, Serial Number 688,951, which merely exemplifies what I now consider a desirable machine for the purpose, but which admits of a wide range of modification and variation within the scope and contemplation 'of the invention.

Described generally, the operative parts of the machine are mounted on a frame, comprising sections designated, respectively. s a whole A and B, both of which are of skeleton construction consisting of rigidly connected side and end members, which conveniently and economically may be built up from suitable structural shapes.

The frame section A forms the base of the machine, and the section B, as shown, is mounted in inclined position thereon, preferably so as to be angularly adjustable. As shown, the lower end of the upper frame section B is pivoted to a rod l, secured in lugs on the side members of the base section A adjacent one end thereof, as shown, and its upper end is supported by a rod 2, which is interchangeable in series of holes formed in upright standards 3 secured to the end of the base section A remote from the pivot for mounting said upper frame section, thus rendering said upper frame section angularly adjustable, if desired. As shown, the upper end of the standards 3 are rigidly connected by a transverse brace 4.

In operation, a roller to be coated, designated as a whole C, is rotatably mounted on the upper frame section B by means of anti-friction rollers 5, which support its upper end, and by engagement of the lower end of its shaft or stock with a tapered socket formed in a bearing support 6, a shank formed on which is rotatably mounted in bearings secured to said upper frame section adducing gear indicated as a whole E.

The anti-friction rollers 5 which support the upper end of a roller C mounted in the machine, are mounted on a plate I slidable on guides 8, secured to the inner sides of the upper frame section B. Said plate 1 provides simple means for quickly and conveniently adjusting the anti-friction rollers 5 towards and from the lower bearing supports 6 to adapt the machine for coating rollers of different lengths.

In accordance with the present invention, roller composition in liquid or semidiquid state is applied to a roll C mounted in the machine, as described, by means of a device or apparatus designated as a whole F, to which in operation, movement lengthwise of said roller is adapted to be imparted by suitable means provided for the purpose, presently described.

The device or apparatus F for applying molten roller composition to a roller C in the machine, consists of a spatula or spreader 9 made of suit- I able sheet material, preferably light gauge sheet steel, pivotly supported on the upper frame sec tion B in position to engage the roller C more or less tangentially at a point below its axis of rotation and which is held yieldably in contact with said roller by a spring applied thereto, said spatula I or spreader being so proportioned that it will extend axially of the roller for a restricted portion only of its length. To prevent said spatula or spreader from catching or digging into the body of the roller C as said spatula or spreader is fed along the same, as presently described, the leading edge thereof is downwardly curved as clearly shown at III, Fig. 4. Also, for reasons presently apparent, the operative surface of said spatula or spreader is inclined relative to the axis of the roller in the machine, the relation being such that the-leading edge of said spatula or spreader will contact with the surface of said roller while ,.the following or trailing edge thereof will be spaced therefrom a distance suflicient to permit a coating of roller composition of desired thickness to adhere to said roller. Also, to permit excess roller composition to flowfreely off from said spatula or spreader, the following edge thereof, also is downwardly curved, as shown, see Figs. 3 and 4. The spatula or spreader F is slidably mounted on the machine frame by means comprising a guide bar or track II, secured to the top of the upper frame section B adjacent one edge thereof. For progressing the spatula I provide a screw I2, rotatably mounted in bearings formed in bearing blocks I3, secured to opposite ends of said bar and in spaced relation thereto, said bearings being constructed to holdsaid screw from end-wise movement in both directions.

The means for mounting said spatula. or spreader slidably upon the guide bar II comprises a block or carriage I4 slidably mounted on said guide bar I'I, preferably by means of a dove-tailed bearing, as shown at I5. For mounting the spatula on the carriage I4 I provide an angular bracket designated as a whole I, comprising legs I6 and I1 provided, respectively, with longitudinal slots I8 and I9. The leg I6 of said-bracket is adapted to rest flat-wise on top. of the block or carriage I4 and to be secured thereto in desired end-wise adjustment by clamping screws 20 which extend through the slot I8 therein and have threaded engagement with holes formed in said block. I

' The leg I! of saidbracket depends from the end of the leg I6 which projects from the block or carriage I4 towards the roller C mounted in the machine, and the spatula or spreader F is secured .to said depending leg H by a bracket'2 I, one leg of which rests flat-wise against the depending leg H of the bracket fandis adapted to be guided vertically and secured in different adjusted-positions on said bracket leg I! by suitablemeans,

consisting, as shown, of guidestuds 22 and 23, both of which extend through the slot IS in said bracket leg and the stud 23 having a wing nut 24 threaded to its projecting end.-

The spatula or spreader F is connected to the bracket 2I by a spring hinge 25, as shown in Figs. 2 to 4, inclusive, said spring hinge being arranged to hold the spatula or spreader in contact with the surface of a roller C mounted in the machine.

In operation, rotation is imparted to both the screw I2 and the bearing support 6, and in turn to the roller C mounted in the machine, by means of a chain belt 26 adjusted to sprocket wheels secured to the shank of said bearing. support and to said screw, as shown in Fig. 1.

The carriage I4 and thus the spatula or spreader F are fed downwards along a roller C longitudinally of the roller and downwardly (that is, from left to right in Fig. 1), by engagement of a nut 21 supported on said carriage with the threads of the screw I2. As shown, see particularly Figs. 1 and 2, said nut 21, is a segmental nut and is formed on the lower end of a bar 28 pivoted at 29 to a lever 30 which, in turn, is pivoted at one end to a stud 3| on the carriage I4. Said segmental nut is maintained yieldably in engagement with the screw I2 by a spring 32 secured to the lever 30 at a point remote from its pivot, and which is arranged to react against a rigid post or projection 33 on the carriage I4 to turn the lever 30 pivotly to effect engagement of said segmental nut with the screw I2. By thus manipulating the lever 30 the segmental nut 21 may be released from engagement with the screw I2 to permit the 1 progressed the carriage down to the bottom end of the roller.

At its upper end the bar 28 is guided by a headed stud 34, which is secured to the post or projection 33 and extends through a slot 35 formed in said bar. Also formed on the lever 30 is a hand grip 36, by means of which the lever 30 may be turned pivotly against the force of the spring 32 to disengage the nut 27 from the screw I2.

For reasons presently explained, the hinged end of the spatula or spreader F is enclosed on three sides by an upstanding flange 31, as shown, see Figs. 2 to 4.

Melted roller composition for coating the rollers C may be supplied from a suitable source consisting, as shown, of a pan G, which it is assumed is water-jacketed and is heated electrically by means of rheostats, not shown, from which melted roller composition is supplied to the spatula or spreader F by means of a circulating pump indicated at H, which we will assume is driven by an electrical motor indicated at I, through a reduclng gear indicated at J. The discharge connection of said pump H is connected by a flexible pipe or hose 38 with a pipe section 38 mounted transverse rod 44 extends into a transverse hole 42 in-the head M and is there adjustably secured by a set screw 43. The other end of the rod 44 extends toward the roller C and is received in the socketed end of one arm of a T-shaped fitting .45. The opposite horizontal arm constitutes a handle. The pipe section 39, to which the end of the hose 38 Is connected, extends through the vertical bore of the fitting 45 and is secured at-the desired height relative to the spatula by a 'set screw in the fitting 45.

The operation of the machine is as follows:

In coating printers rollers with roller composition by means of my improved machine, a roller C to be coated isrplaced in the machine in such relation that it will bear upon the leading edge of the spatula F and in such adjustment that it will depress the free end of said spatula sufficiently to subject the spring applied thereto to tension sufficient to hold said spatula against the roller C with a desired pressure in operation. With a supply of melted roller composition in the pan G the pump motor I is started to operate as described, to discharge melted roller composition onto the spatula F within the flange 31, whence it will flow along said spatula into contact with the roller C. The motor D, which drives the roller C and the screw I2, is also started, turning the roller counter-clockwise (Fig. 2) and progressing the carriage downwardly longitudinally of the roller. A thin coating of roller composition-say in thicknessadheres to said roller at the following edge of the spatula, which, as heretofore explained, is slightly inclined away from said roller. Obviously, as the spatula F is fed endwise along the roller C by the screw l2, a continuous coating of composition will be applied to said roller, the thickness of which will depend upon the clearance between the following edge of the spatula and the surface of the body portion of the roller.

After a roller C is fully coated, the machine is shut down, the roller removed therefrom and placed upright in a rack provided for the purpose and the carriage returned to the upper end of the guide bar II. This completes the cycle which is repeated for each roller coated.

Excess roller composition which drains froln the spatula and roller during the coating operation, is caught by the trough 41 by which it is returned to the pan G to be reheated and recirculated.

I claim,

1. In a machine for coating printers rollers,

the combination of a frame, means for rotatably mounting a roller therein, means for applying roller composition to said roller comprising a spatula, a carriage to which said spatula is pivoted in position to engage a roller mounted in the machine below its center, means for'movably supporting said carriage on the machine frame and guiding it length-wise of a roller in the machine, a spring applied to said spatula for holding the same yieldingly in contact with a roller in the machine with its following edge spaced therefrom, means for adjusting said spatula vertically and also transversely towards and from said roller, and means for discharging melted roller composition upon said spatula. 2. The means for coating printers rollers specified in claim 1, which also comprises means for imparting movement to the carriage of the machine lengthwise of a roller in the machine and means for rotating said roller.

3. The machine for coating printers rollers specified in claim 1, in which the portion of the surface of the spatula upon which roller composition is discharged is enclosed on three sides by an upstanding flange with the space defined thereby open towards the roller.

4. The machine for coating printers rollers specified in claim 1, in which the means for mounting the spatula comprises an angle one leg of which is secured to the carriage of the machine, and to the other leg of whichsaid spatula is secured.

5. The machine for coating printers rollers specified in claim 1, in which the means for mounting the spatula comprises an angle one leg of which is secured to the machine carriage, and to the other leg of which spatula is adjustably secured.

6. The machine for coating printers rollers specified in claim 1, in which the means for mounting the spatula comprises an angle one leg of which is secured to the machine carriage, and to the other leg of which spatula is adjustably secured by means of a spring hinge.

7. The machine specified in claim 1, in which the surface of the spatula which contacts with the roller, diverges therefrom from its leading towards its following edges.

8. A printers roller coating machine comprising means for rotatably mounting a roller, a composition-applying broad-surfaced spatula, means for mounting the spatula for movement along the roller and for maintaining the broadsurface of the spatula tangentially against the roller, and means for feeding melted roller composition onto the spatula.

9. A printers roller coating machinecomprising means for rotatably mounting a roller, a composition-applying broad-surfaced spatula, means for mounting the spatula for movement along the roller and for maintaining the broadsurface of the spatula tangentially against the roller, and means for feeding melted roller composition onto thespatula at the trailing side of the roller. Y

10. A printers roller coating machine comprising means for rotatably mounting a roller, a composition-applying spatula, means for mounting the spatula for movement along the roller and for resiliently pressing the spatula tangentially against the roller at the under side thereof, and means for feeding melted roller composition onto the spatula at the trailing side of the roller.

11. A printers roller coating machine comprising means for journaling a roller, a compositionapplying spatula, a carriage for supporting the spatula with its broad surface tangentially against the under side of the roller surface, a way for the carriage parallel with the roller, feed means discharging melted roller composition onto the spatula, and means for rotating the roller and for progressing the carriage along the way.

12. A printers roller coating machine comprising means for journaling a roller, a compositionapplying broad-surfaced spatula, a carriage for supporting the spatula with its broad surface tangentially against the roller surface, a way for the carriage parallel with the roller, feed means discharging melted roller composition onto the spatula, and common power means for rotating the roller and for progressing the carriage along the way in timed relation.

13. A printers roller coating machine comprising means for journaling a roller in inclined position, a composition-applying spatula, a carriage for supporting the spatula tangentially against the under side of the roller surface, a way for the carriage parallel with the roller, feed means discharging melted roller composition onto the spatula at one side of the roller, and common power means for rotating the roller away from the feed side of the spatula and for progressing the carriage downwardly along the way in timed relation.

14. A printers roller coating machine compris 10 gressing the carriage along the way.

15. A printers roller coating machine comprising means for journaling a roller, a compositionapplying spatula, a carriage for supporting the spatula tangentially against the under side of roller surface, a way for the carriage parallel with the roller, a stationary source of melted roller composition, feed means, including a flexible conduit, discharging melted roller composition from the source onto the spatula, and means for rotating the roller and for progressing the carriage along the way.

CARL G. BINGHAM. 

